<template>
  <div class="login_container">
    <div class="login_box" :style="login_box">
      <!-- 头像区 -->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt="avatar" />
      </div>
      <!-- 登录表单 -->
      <div>
        <el-form
          ref="loginFormRef"
          :model="loginForm"
          :rules="loginFormRules"
          label-width="60px"
          class="login_form"
        >
          <el-form-item label="账号" prop="username">
            <el-input
              v-model="loginForm.username"
              prefix-icon="iconfont icon-user"
            ></el-input>
          </el-form-item>
          <el-form-item label="密码" prop="password">
            <el-input
              v-model="loginForm.password"
              type="password"
              prefix-icon="iconfont icon-3702mima"
            ></el-input>
          </el-form-item>

          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form>
      </div>
    </div>
  </div>
</template>
<script>
export default {
  data() {
    return {
      loginForm: {
        username: "admin",
        password: "123456",
      },
      // 表单验证
      loginFormRules: {
        username: [
          { required: true, message: "请输入用户名", trigger: "blur" },
          {
            min: 2,
            max: 10,
            message: "长度在 2 到 10 个字符",
            trigger: "blur",
          },
        ],
        password: [
          { required: true, message: "请输入用户密码", trigger: "blur" },
          {
            min: 6,
            max: 18,
            message: "长度在 6 到 18 个字符",
            trigger: "blur",
          },
        ],
      },
      winHeight: 0,
      winWidth: 0,
      login_box: {
        marginTop: "",
        marginLeft: "",
      },
    };
  },
  mounted() {
    this.winHeight = document.documentElement.clientHeight;
    this.winWidth = document.documentElement.clientWidth;

    this.login_box.marginTop = (this.winHeight - 360) / 2 + "px";
    this.login_box.marginLeft = (this.winWidth - 450) / 2 + "px";
  },
  methods: {
    //重置
    resetLoginForm() {
      this.$refs.loginFormRef.resetFields();
    },
    login() {
      //表单预校验
      this.$refs.loginFormRef.validate(async (valid) => {
        if (valid) {
          const { data: res } = await this.$http.post("login", this.loginForm);
          if (res.meta.status !== 200) return this.$message.error("登录失败");
          this.$message.success("登录成功");
          //缓存token
          window.sessionStorage.setItem("token", res.data.token);
          this.$router.push("/home");
        }
      });
    },
  },
};
</script>
<style scoped>
.login_container {
  position: absolute;
  background-color: #2b4b6b;
  width: 100%;
  height: 100%;
}
.login_box {
  width: 450px;
  height: 360px;
  border-radius: 3px;
  background-color: #fff;
}

.login_box .avatar_box {
  width: 130px;
  height: 130px;
  border: 1px solid #eee;
  border-radius: 50%;
  padding: 10px;
  box-shadow: 0 0 10px #ddd;
  position: absolute;
  left: 48.5%;
  top: 30%;
  -webkit-transform: translate(-30%, -48.5%);
  transform: translate(-30%, -48.5%);
  background-color: #fff;
}
.login_box .avatar_box img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background-color: #eee;
}

.login_form {
  width: 100%;
  padding: 100px 20px;
  box-sizing: border-box;
}

.el-form-item__content {
  margin-left: 0px !important;
}
.info {
  font-size: 13px;
  margin: 10px 15px;
}
</style>
